This document discusses the classification and characteristics of reptiles. It outlines the four orders of reptiles: turtles, snakes, lizards, and crocodilians. Reptiles are cold-blooded with boney skeletons covered in scales, come in three body types, have three-chambered hearts, and lay eggs or give birth to live young. There are approximately 6,500 species of reptiles.

1. Reptiles
By Mr. “Reptile Lover” Chapman

2. Classification
• Kingdom: Animalia
• Phylum: Chordata
• Class: Reptilia
• Order: 4 orders of reptiles

3. 4 Orders of Reptiles
• 1.Testudines– turtles, tortoises, Terrapins

4. Sepentes
• 2. Serpentes – snakes, pythons, boas

5. Squamata
• 3. Squamata – Iguanas, lizards

6. • 4. Crocodilia – crocodiles, alligators,
Gariels

7. Characteristics
• Cold-blooded
• Use lungs to breathe air
• Boney skeleton
• Scales cover the body
• 3 body types
– Long bodies with defined tails (crocs. and lizards)
– Long bodies that taper into tails (snakes)
– Short-thick bodies encased in shells (turtles)

8. Characteristics
• Three chambered heart with a septum.
• Greatly reduced metabolic rate so not
much heat is produced within the body

9. Class: Reptilia
• There are about 6,500
species of reptiles.
• skin is covered with
waterproof scales.
• Scales attach below
the epidermis.

10. Class: Reptilia
• A heart with three
chambers and a
septum that partially
divided ventricle.
• This limits mixing of
oxygenated and
deoxygenated blood
in the heart.

11. Class: Reptilia
• Most lay eggs that are
covered with a soft
shell or give birth to
live young.
• All reptiles are cold
blooded.